//
//  Copyright 2012 Alin Dobra and Christopher Jermaine
//
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.
//
private:

	// the actual data in the chunk
	Column **cols;
	int numCols;
	int actualNumCols;

	// bitmap for each tuple
	// this bitmap should be used to determine the number of tuples in the chunk
	BStringIterator mbitColumn;

// functin to delete the content
void Erase(void);
